<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        // 1.全选
        var cartGoods = [
            {
                goodsname: '小米10',
                price: 5000,
                isChecked: true,//代表是否选中了
            },
            {
                goodsname: '苹果10',
                price: 3000,
                isChecked: false,//代表是否选中了
            },

            {
                goodsname: '小米10',
                price: 5000,
                isChecked: true,//代表是否选中了
            }
        ];


        // 数组的迭代
        var resChecked = cartGoods.every(val => val.isChecked);


        if (resChecked) {
            console.log("全选");
        } else {
            console.log("不全选");
        }


        // 2.加薪
        var persons = [
            {
                username: '张飞',
                sex: '男',
                salary: 50000
            },
            {
                username: '关羽',
                sex: '男',
                salary: 60000
            }
        ];

        var resArr = persons.map(val => ({ username: val.username, sex: val.sex, salary: val.salary + 2000 }));

        console.log(resArr);
    </script>
</body>

</html>